Ruellia britoniana 'Ground hugger'

Plant type: evergreen perennial
Height: 1- 1.5 feet
Cultural Requirements: pinch back after flowering, otherwise fairly adaptable.
Leaves: opposite, lanceolate leaves
Disease and Insects: none
Hardiness: zones 8-10
spacing: 15-18 inches

http://www.mobot.org/gardeninghelp/images/low/Z300-0901020.jpg